Both parties have been accused by media and ad agencies of obliging them to meet some ad investment quotas and the joint commercialisation of ad packages on their different channels, with these illegal practices being restrictive to free competition in the market.

In particular, the two groups allegedly oblige media agencies to invest in their smaller channels if they also want to advertise on the big channels such as Tele 5 and Antena 3.

Mediaset and Atresmedia control around 83 per cent of the TV ad market in the country, according to the latest CNMC figures